how do i solve this truffle compile error?

Question

The following error is shown when using compiling with truffle:

Source file requires different compiler version (current compiler is 0.5.0+commit.1d4f565a.Emscripten.clang - note that nightly builds are considered to be strictly less than the released version
pragma solidity ^0.4.23;
^----------------------^
SyntaxError: Source file requires different compiler version (current compiler is 0.5.0+commit.1d4f565a.Emscripten.clang - note that nightly builds are considered to be strictly less than the released version
pragma solidity ^0.5.4;
^---------------------^
Compilation failed. See above.
Truffle v5.0.4 (core: 5.0.4)
Node v8.12.0

Answer 1

The truffle that you have installed doesnot support solidity compiler 0.5.4, you may either try solving it by using compiler of 0.4.23 or higher as pragma solidity >=0.4.23 or upgrade the compiler that your truffle supports which is mentioned in this link

Answer 2

You should declare solidity compiler version in truffle.js file.

  compilers: {
    solc: {
      version: '^0.4.23'
    }
  }

Answer 3

Some things you can do,

1. Open the file in VS Code . Right click on .sol file and click "solidity:download compiler". Then select the version that matches the version of solidity used in your contract (i.e written at top of the .sol file ). Then right click again on the .sol file and choose "solidity : Change the default workspace compiler to remote, local,...".From that choose "localNodeModule"

2. Right click again on the .sol file and choose "solidity : Change the default workspace compiler to remote, local,...".From that choose "remote"

Answer 4

Go to VS Code>File>preferences>settings there under left panel, u'll find extensions and in it u'll find solidity preferences. There choose remote.

With that the file will start using the mentioned version